diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5762280bb..9b3357bd3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -27,6 +27,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - [#215](https://github.com/ClementTsang/bottom/pull/215): Add labels to Linux temperature values.
 
+- [#224](https://github.com/ClementTsang/bottom/pull/224): Implements sorting by count. It previously did absolutely nothing.
+
 ## [0.4.7] - 2020-08-26
 
 ### Bug Fixes
diff --git a/src/app.rs b/src/app.rs
index 8db5f7778..1aa390f7d 100644
--- a/src/app.rs
+++ b/src/app.rs
@@ -268,6 +268,19 @@ impl App {
                         // Toggles process widget grouping state
                         proc_widget_state.is_grouped = !(proc_widget_state.is_grouped);
 
+                        // Forcefully switch off column if we were on it...
+                        if (proc_widget_state.is_grouped
+                            && proc_widget_state.process_sorting_type
+                                == data_harvester::processes::ProcessSorting::Pid)
+                            || (!proc_widget_state.is_grouped
+                                && proc_widget_state.process_sorting_type
+                                    == data_harvester::processes::ProcessSorting::Count)
+                        {
+                            proc_widget_state.process_sorting_type =
+                                data_harvester::processes::ProcessSorting::CpuPercent; // Go back to default, negate PID for group
+                            proc_widget_state.process_sorting_reverse = true;
+                        }
+
                         proc_widget_state
                             .columns
                             .column_mapping
diff --git a/src/lib.rs b/src/lib.rs
index 1b1c3e7bf..2c15c73dc 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -510,16 +510,6 @@ pub fn update_final_process_list(app: &mut App, widget_id: u64) {
 
     // Quick fix for tab updating the table headers
     if let Some(proc_widget_state) = app.proc_state.get_mut_widget_state(widget_id) {
-        if let data_harvester::processes::ProcessSorting::Pid =
-            proc_widget_state.process_sorting_type
-        {
-            if proc_widget_state.is_grouped {
-                proc_widget_state.process_sorting_type =
-                    data_harvester::processes::ProcessSorting::CpuPercent; // Go back to default, negate PID for group
-                proc_widget_state.process_sorting_reverse = true;
-            }
-        }
-
         let mut resulting_processes = filtered_process_data;
         sort_process_data(&mut resulting_processes, proc_widget_state);
 
@@ -645,7 +635,15 @@ pub fn sort_process_data(
             )
         }),
         ProcessSorting::Count => {
-            // Nothing should happen here.
+            if proc_widget_state.is_grouped {
+                to_sort_vec.sort_by(|a, b| {
+                    utils::gen_util::get_ordering(
+                        a.group_pids.len(),
+                        b.group_pids.len(),
+                        proc_widget_state.process_sorting_reverse,
+                    )
+                });
+            }
         }
     }
 }